package com.hd.appcommon.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.hd.appcommon.entity.Student;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface StudentMapper extends BaseMapper<Student> {
    @Select("SELECT user_id from student")
    List<String> getAllDdid();
}
